US3763387A - X-ray tube with rotary anode - Google Patents

X-ray tube with rotary anode Download PDF

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Publication number
US3763387A
US3763387A US00096527A US3763387DA US3763387A US 3763387 A US3763387 A US 3763387A US 00096527 A US00096527 A US 00096527A US 3763387D A US3763387D A US 3763387DA US 3763387 A US3763387 A US 3763387A
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United States
Prior art keywords
anode
ray tube
sectors
focal spot
plate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00096527A
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English (en)
Inventor
K Silbermann
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of US3763387A publication Critical patent/US3763387A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes

Definitions

  • ABSTRACT An X-ray tube with a rotary anode the path of the focal spot of which is subdivided by separating adjoining sur- 5H on 35/04 faces.
  • the invention is particularly characterized in [58] Field of Search 313/60, 330, 58 that the Separating adjoining surfaces extend n I through the path of the focal spot but also through the [56] References Cited anode body- UNITED STATES PATENTS 2,482,053 9/1949 Zunick 313/58 X 5 Claims, 2 Drawing Figures f l' 1 1 5 16 8 I 1 1; 14 a 1 13 1 L 11 1O 9 l X-RAY TUBE WIT-H ROTARY ANODE DESCRIPTION OF THE INVENTION
  • This invention relates to an X-ray tube with a rotary anode the path of the focal spot of which is subdivided by separating joints.
  • the entire anode consists of a material which does not melt easily and has the shape of a plate, a pot, a ring or the like, from which heat created during the production of rays is radiated.
  • An object of the present invention is to avoid these drawbacks of prior art constructions.
  • Parts which in the usual anode plates or anode rings have the shape of sectors and consist of difficultlymelting substances of high order, such as tungsten, molybdenum, alloys of tungsten and rhenium etc., can be held together by clamps, or a ring consisting of similar or the same material as the parts of the anode. Then during heating the clamping has properties similar to the subdivided anode and thus the holding together of the parts is assured.
  • the clamping ring can be inserted or soldered at the lower side of the anode in a ring-shaped groove extending concentrically to the central axle.
  • a compound material consisting of layers can be also used for the anode. This material may consist of a difficultly melting carrier, for example, graphite, and a difficultly melting metal, such as tungsten and its alloys, which is sprayed or soldered etc. as a layer.
  • the side edges of the parts of the anode which engage each other in the separating adjoining surfaces are preferably cut relatively to each other, so that, for example, they overlap each other, so that no slits are formed which extend through the thickness of the anode plate and which would permit passage for the electrons of the cathode. It is of importance that the separating adjoining surfaces should extend at least partly in a direction different from that of the electrons coming from the cathode.
  • the separating adjoining surfaces can also deviate from a straight line in the radial direction. They can have, for example, the shape of teeth, etc.
  • Parts of anode, particularly at their lower sides, can be provided for additional stabilization with radially extending strengthening members, such as ribs, etc.
  • FIG. 1 is a perspective view of an X-ray tube constructed in accordance with the principles of the present invention.
  • FIG. 2 is a perspective view of an anode plate on an enlarged scale, one of the sectors having been removed.
  • FIG. 1 shows the glass bulb 1 of the X-ray tube 2.
  • the glass bulb l is cylindrical and at its two ends are located opposite each other in a manner known per se the cathode combination 3 and the anode combination 4.
  • the cathode combination 3 includes the holder 5 with the screen 6 in which is located the glow cathode.
  • the glow cathode is covered and therefore not shown in the drawing.
  • the anode combination 4' consists of a rotor 7 and an anode plate 8 having in the illustrated example a diameter of 100 mm. and a thickness of 6 mm.
  • the anode plate 8 is composed of sectors, 9, l0, 1 l and 12.
  • Focal spotpaths l3 and 14 are located upon the sectors in a manner known per se in connection with anode plates.
  • the plate 8 is fixed upon an axle by a screw 16.
  • the necessary operational and heating voltages are supplied to the X-ray tube through the anode joint 17 as well as the conduits l8, l9 and 20.
  • the sectors 9 to 12 of the anode plate 8 can shift relatively to each other due to the heating which is then produced and which causes their expansion relatively to each other, thereby avoiding tears.
  • Step-like overlaps 21 and 22 are located, as shown, at the edges of the plate 8; they prevent the electrons proceeding from the cathode from passing through the separating adjoining surfaces of the anode plate 8.
  • the connection of the sectors 9 to 12 takes place from the bottom by means of a plate 24 consisting of the difficultly meltable metal molybdenum and mounted upon a flange 23 of the axle 15.
  • the sides surfaces of the sectors 9 and 11 shown in FIG. 2 indicate that the focal spot paths l3 and 14 of the anode 8 are located upon a layer 25 of a rhenium-tungsten alloy which is l.5 mm. thick and which is carried by a plate 26 consisting of molybdenum.
  • a firm connection takes place by an annular shoulder 27 located upon the edge of the plate 24 and engaging an annular groove 28 provided upon the under surfaces of the sectors 9 to 12.
  • the sectors 9 to 12 are pressed by the screw 16 against the plate 24 which lies upon the flange 23 of the axle 15. Due to this arrangement the annular shoulder 27 firmly engages the groove 28 and together with the plate 24 constitutes a hook connecting the sectors 9 to 12 with the axle 15.
  • Ribs 29 are located upon the underside of sectors 9 to 12 at uniform distances from each other. At their outer edges the ribs are axially 5 mm. high and their height diminishes gradually to zero at the edge of the plate 24. Each of the sectors 9 to 12 has four ribs 29 which serve to strengthen the structure. The ribs have a base which is 2.5 mm. wide and they have a narrow end surface with rounded edges.
  • An X-ray tube having a rotary anode and a focal spot path upon said anode having an outer surface consisting of the same material throughout the focal spot path, said anode and said focal spot path consisting of sectors separated by adjoining surfaces extending through the anode from the center of the anode to its outer edges.
  • An X-ray tube in accordance with claim 1 having a plate-like or ring-shaped anode plate, wherein said separating adjoining surfaces extend radially to divide the anode plate into a plurality of sectors, said sectors having an annular groove upon their bottom surface, and a ring engaging said groove for holding said sectors together.

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  • X-Ray Techniques (AREA)
US00096527A 1970-02-28 1970-12-09 X-ray tube with rotary anode Expired - Lifetime US3763387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2009538A DE2009538C3 (de) 1970-02-28 1970-02-28 Röntgenröhren-Drehanodenteller, der durch radiale Trennfugen in Sektoren unterteilt ist

Publications (1)

Publication Number Publication Date
US3763387A true US3763387A (en) 1973-10-02

Family

ID=5763708

Family Applications (1)

Application Number Title Priority Date Filing Date
US00096527A Expired - Lifetime US3763387A (en) 1970-02-28 1970-12-09 X-ray tube with rotary anode

Country Status (5)

Country Link
US (1) US3763387A (de)
DE (1) DE2009538C3 (de)
FR (1) FR2078933A5 (de)
GB (1) GB1294625A (de)
SE (1) SE358992B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836803A (en) * 1971-03-16 1974-09-17 Siemens Ag Rotary anode and an x-ray tube provided therewith
US3836804A (en) * 1971-11-19 1974-09-17 Philips Corp Slotted anode x-ray tube
US3900751A (en) * 1974-04-08 1975-08-19 Machlett Lab Inc Rotating anode x-ray tube
US4943989A (en) * 1988-08-02 1990-07-24 General Electric Company X-ray tube with liquid cooled heat receptor
FR2655190A1 (fr) * 1989-11-28 1991-05-31 Gen Electric Cgr Anode pour tube a rayons x a resistance mecanique elevee.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855492A (en) * 1973-11-19 1974-12-17 Machlett Lab Inc Vibration reduced x-ray anode
JPS5857247A (ja) * 1981-09-30 1983-04-05 Toshiba Corp Ｘ線管用回転陽極およびその製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482053A (en) * 1945-11-13 1949-09-13 Gen Electric X Ray Corp Anode construction
US3229089A (en) * 1962-10-25 1966-01-11 Hayakawa Denki Kogyo Kabushiki An x-ray system for producing a specimen image in color

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482053A (en) * 1945-11-13 1949-09-13 Gen Electric X Ray Corp Anode construction
US3229089A (en) * 1962-10-25 1966-01-11 Hayakawa Denki Kogyo Kabushiki An x-ray system for producing a specimen image in color

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836803A (en) * 1971-03-16 1974-09-17 Siemens Ag Rotary anode and an x-ray tube provided therewith
US3836804A (en) * 1971-11-19 1974-09-17 Philips Corp Slotted anode x-ray tube
US3900751A (en) * 1974-04-08 1975-08-19 Machlett Lab Inc Rotating anode x-ray tube
US4943989A (en) * 1988-08-02 1990-07-24 General Electric Company X-ray tube with liquid cooled heat receptor
FR2655190A1 (fr) * 1989-11-28 1991-05-31 Gen Electric Cgr Anode pour tube a rayons x a resistance mecanique elevee.
EP0430767A1 (de) * 1989-11-28 1991-06-05 General Electric Cgr S.A. Röntgenröhrenanode mit hohen mechanischen Festigkeitswerten
US5125020A (en) * 1989-11-28 1992-06-23 General Electric Cgr S.A. Anode for x-ray tube with high mechanical strength

Also Published As

Publication number Publication date
DE2009538C3 (de) 1975-01-09
DE2009538B2 (de) 1974-05-30
SE358992B (de) 1973-08-13
GB1294625A (en) 1972-11-01
DE2009538A1 (de) 1971-09-09
FR2078933A5 (de) 1971-11-05

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